Making blind-eye hooks from return loop-eye hooks is not difficult. You'll need a propane torch, an old needle nose pliers (the older and beat up the better ... you'll end up heating the pliers in the process), an electric hand drill (or a small metal lathe like the Unimat), 600 grit wet-dry sandpaper and the kitchen oven.

Grasp the end of the return loop with the pliers and heat the bend to a red heat, while taking out most of the bend at the same time. With heating and reworking, make the hook as straight and kink free as possible (keeping the area being worked on at a near red heat, otherwise the hook may break). Moreover, work as quickly as possible. Don't leave the hook in the flame any longer than necessary; overheating can weaken the metal.

Now heat the entire reworked area red hot and allow the metal to cool. Holding the hook with one hand, position it on a flat piece of steel or a small anvil and pound out remaining kinks with gentle blows of a hammer. Now heat the entire reworked area red hot and immediately drop the hook into cold water. Grasp the hook by the bend in the jaws of the drill or 3-jaw lathe chuck, positioning it so that it rotates as concentricly as possible without a lot of wobble, and sand the reworked area to a shiny smoothness (a 1" diameter fine grit rubberized abrasive wheel in a Dremel Tool in conjunction with hook rotation really speeds things along here).

Then place the hook on a piece of aluminum foil and put this in the oven at 450 degrees F for 15 minutes. Before it has a chance to cool, remove the hook and quickly drop it into cold water.

Oven-heating and quenching will return the hook to a blue-black oxidized finish and the hook will now have its original springy hardness.

Diagram "A" shows a typical hook before reworking.

Diagram "B" shows the same hook after rebending and reworking.